This is interesting. However, I seem to have hit a roadblock at level 6 (layer). I tried changing the z-index (thinking it might reveal something, because - lay

This is interesting. However, I seem to have hit a roadblock at level 6 (layer). I tried changing the z-index (thinking it might reveal something, because - layers), but in vain. Scanned through the HTML and css. Nothing, still. Hints?